US8777438B2 - Direct type backlight unit and liquid crystal display device using the same - Google Patents
Direct type backlight unit and liquid crystal display device using the same Download PDFInfo
- Publication number
- US8777438B2 US8777438B2 US13/639,484 US201213639484A US8777438B2 US 8777438 B2 US8777438 B2 US 8777438B2 US 201213639484 A US201213639484 A US 201213639484A US 8777438 B2 US8777438 B2 US 8777438B2
- Authority
- US
- United States
- Prior art keywords
- support structure
- bottom plate
- diffusion plate
- height
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Definitions
- the present invention relates to a direct type backlight unit and a liquid crystal display device using the same, and more particularly to a support structure which can improve a dark area problem
- a direct-type backlight unit using light emitting diodes is capable of local dimming, has high luminance uniformity and no mercury pollution problem, such that the direct-type backlight unit becomes popular.
- the direct-type backlight unit can be implemented by two conventional methods. In the first method, a surface mount type LED is adopted, but this method normally requires a large number of LEDs. On the other hand, in the second method, a surface mount type LED and a second lens are used together, which can reduce the number of LEDs used.
- FIG. 1 it is a structure view of a conventional direct-type backlight unit.
- the backlight unit comprises: an optical sheet 940 , a diffusion plate 960 , a bottom plate 910 , a plurality of LEDs, and a plurality of support structures 930 .
- FIG. 1 only shows two LEDs 920 and a support structure 930 .
- the optical sheet 940 is disposed on the diffusion plate 960 ; the bottom plate 910 is disposed below the diffusion plate 960 ; the LEDs 920 are disposed between the diffusion plate 960 and the bottom plate 910 ; the support structure 930 is disposed between the diffusion plate 960 and the bottom plate 910 , and one end of the support structure 930 is fixed on the bottom plate 910 and the other end of the support structure 930 is contacted with the diffusion plate 960 .
- FIG. 3 it is a luminous intensity distribution curve of the LED 920 with an additional secondary lens.
- the black line 8 in the FIG. 3 shows an LED having bat-type light field with different luminous intensities in different angles.
- the light intensity in the two lateral sides is stronger than that of the middle portion in the LED.
- One objective of the present invention is to overcome the drawbacks of the conventional backlight unit that a dark area occurs on a diffusion plate when a support structure is located on a light traveling path, such that the quality of images is affected.
- the present invention provides a novel backlight unit in order to solve the above-mentioned problems.
- Another objective of the present invention is to overcome the drawbacks of the conventional liquid crystal display device having a backlight unit that a dark area occurs on a diffusion plate when a support structure is located on a light traveling path, such that the quality of images is affected.
- the present invention provides a novel liquid crystal display device having a backlight unit in order to solve the above-mentioned problems.
- the present invention provides a direct type backlight unit comprising an optical film; a diffusion plate for supporting the optical film; a bottom plate disposed under the diffusion plate; a plurality of light emitted diodes disposed between the diffusion plate and the bottom plate; and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, wherein each support structure is disposed between two adjacent light emitting diodes, a height of each support structure is smaller than a distance between the bottom plate and the diffusion plate.
- a distance between the bottom plate and the diffusion plate is a cavity height (Hc)
- a distance between the bottom plate and a top end of the support structure is a support structure height (Hs)
- a distance between the support structure and the light emitting diode is a spacing (S)
- the cavity height (Hc), the support structure height (Hs), and the spacing (S) need to satisfy an equation of (Hc ⁇ Hs) ⁇ S/Hs ⁇ 3.5 mm.
- the surface of the support structure of the backlight unit is a polishing surface, a frosting surface, a reflector surface, or a scattering surface.
- the cross-section of the support structure of the backlight unit is a circle shape, an elliptic shape, a regular polygon shape, an irregular polygon shape, or a saw-tooth shape.
- the support structure of the backlight unit is a pyramid, a cone, a cylinder, or a prism.
- the present invention provides a liquid crystal display device comprising: a liquid crystal panel; and a direct type backlight unit for providing light to the liquid crystal panel, comprising: an optical film; a diffusion plate for supporting the optical film; a bottom plate disposed under the diffusion plate; a plurality of light emitted diodes disposed between the diffusion plate and the bottom plate; and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, wherein each support structure is disposed between two adjacent light emitting diodes, and a height of each support structure is smaller than a distance between the bottom plate and the diffusion plate.
- the surface of the support structure of the liquid crystal display device is a polishing surface, a frosting surface, a reflector surface, or a scattering surface.
- the cross-section of the support structure of the liquid crystal display device is a circle shape, an elliptic shape, a regular polygon shape, an irregular polygon shape, or a saw-tooth shape.
- the support structure of the liquid crystal display device is a pyramid, a cone, a cylinder, or a prism.
- the direct type backlight unit and the liquid crystal display device using the same of the present invention have the following advantageous effect: by reducing a height of the support structure, a spacing is existed between the structure support and an optical film; therefore, the light emitted from LEDs can pass through the spacing between the support structure and the diffusion plate, such that it can improve the problem that a dark area occurs on the diffusion plate.
- FIG. 1 illustrates a partial structure of a conventional direct type backlight unit
- FIG. 2 illustrates a partial structure of a conventional direct type backlight unit when a light emitting diode emits light
- FIG. 3 illustrates a luminous intensity distribution curve of LEDs with an additional secondary lens
- FIG. 4 is a cross-sectional view of a direct type backlight unit according to an embodiment of the present invention.
- FIG. 5 illustrates a liquid crystal display device according to an embodiment of the present invention.
- the direct type backlight unit 1 comprises an optical film 140 , a diffusion plate 160 , a bottom plate 110 , a plurality of LEDs 120 , and a plurality of support structures 130 .
- FIG. 4 only shows two LEDs 120 and a support structure 130 .
- the optical film 140 is disposed on the diffusion plate 160 .
- the bottom plate 110 is disposed under the diffusion plate 160 .
- the LEDs 120 are disposed between the diffusion plate 160 and the bottom plate 110 , and fixed on the bottom plate 110 .
- the supporting structures 130 are disposed between the diffusion plate 160 and the bottom plate 100 , and fixed on the bottom plate 110 , wherein each support structure 130 is disposed between two adjacent LEDs 120 , and a height of each support structure 130 is smaller than a distance between the bottom plate 110 and the diffusion plate 160 .
- the distance between the bottom plate 110 and the diffusion plate 160 is a cavity height (Hc), a distance between the bottom plate 110 and a top end of the support structure 130 is a support structure height (Hs), a distance between the support structure 130 and the light emitting diode 120 is a spacing (S), wherein the cavity height (Hc), the support structure height (Hs), and the spacing (S) need to satisfy an equation of (Hc ⁇ Hs) ⁇ S/Hs ⁇ 3.5 mm.
- the LED 120 emits a light
- the light can pass through the spacing between the support structure 130 and a diffusion plate 160 , such that the color of dark area 150 appeared on the diffusion plate 160 becomes much lighter.
- the optical films 140 disposed sequentially from bottom to top include a 0 degree lens, a 90 degree lens, and a brightness enhancement film, but not limited herein.
- the bottom plate 110 may be a reflector which increases light utilization efficiency.
- the support structure is made of a rigid material (e.g., acrylic materials, plastic materials, and metal materials).
- the surface of the support structure 130 may be a polishing surface, a frosting surface, a reflector surface, or a scattering surface.
- the cross-section of the support structure 130 may be a circle shape, an elliptic shape, a regular polygon shape, an irregular polygon shape, or a saw-tooth shape.
- the support structure 130 may be a pyramid, a cone, a cylinder, or a prism.
- FIG. 5 illustrates a liquid crystal display device according to an embodiment of the present invention.
- the liquid crystal display device 2 comprises a liquid crystal panel 210 and a direct type backlight unit 220 .
- the direct type backlight unit 220 provides light to the liquid crystal panel 210 for displaying an image.
- the direct type backlight unit 220 is the above mentioned the direct type backlight unit of embodiment of the present invention, wherein the liquid crystal display device 2 may further comprise a plastic frame, a front frame, a back cover, and so on, but the details of these devices and related structures are prior art and will be omitted herein.
- the direct type backlight unit and the liquid crystal display device using the same of the present invention has the following advantageous effect: by reducing a height of a support structure, a spacing is existed between the supporting structure and an optical film; therefore, the light emitted from the LEDs can pass through the spacing between the support structure and a diffusion plate, such that it can improve problems that a dark area occurs on the diffusion plate.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims (9)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210204446.7A CN102748667B (en) | 2012-06-20 | 2012-06-20 | Straight-down type backlight module and liquid crystal display thereof |
CN201210204446 | 2012-06-20 | ||
CN201210204446.7 | 2012-06-20 | ||
PCT/CN2012/079567 WO2013189116A1 (en) | 2012-06-20 | 2012-08-02 | Direct backlight module and liquid crystal display comprising same |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130343040A1 US20130343040A1 (en) | 2013-12-26 |
US8777438B2 true US8777438B2 (en) | 2014-07-15 |
Family
ID=47029064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/639,484 Active 2032-08-22 US8777438B2 (en) | 2012-06-20 | 2012-08-02 | Direct type backlight unit and liquid crystal display device using the same |
Country Status (3)
Country | Link |
---|---|
US (1) | US8777438B2 (en) |
CN (1) | CN102748667B (en) |
WO (1) | WO2013189116A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103090272B (en) * | 2013-01-25 | 2015-08-12 | 京东方科技集团股份有限公司 | A kind of down straight aphototropism mode set and display unit |
JP5646001B2 (en) * | 2013-05-15 | 2014-12-24 | シャープ株式会社 | Direct type backlight and television receiver |
CN103712160A (en) * | 2013-12-24 | 2014-04-09 | 南京中电熊猫液晶显示科技有限公司 | Diffusion plate support and backlight module |
WO2024021074A1 (en) * | 2022-07-29 | 2024-02-01 | 京东方科技集团股份有限公司 | Light-emitting substrate, backlight module, display apparatus, and preparation method for light-emitting substrate |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070047225A1 (en) | 2005-08-30 | 2007-03-01 | Funai Electric Co., Ltd. | Direct type backlight device for liquid crystal module |
JP2007322697A (en) | 2006-05-31 | 2007-12-13 | Sony Corp | Backlight device and liquid crystal display device |
US20080030648A1 (en) | 2006-06-02 | 2008-02-07 | Sony Corporation | Planar light-source apparatus |
CN101641633A (en) | 2007-04-09 | 2010-02-03 | 夏普株式会社 | Lighting device for display device, display device, and TV receiver |
JP2011086553A (en) | 2009-10-16 | 2011-04-28 | Sumitomo Chemical Co Ltd | Plane light source device, liquid crystal display, and light diffusion plate |
US20110134629A1 (en) * | 2008-07-29 | 2011-06-09 | Yong Suk Kim | Back-light unit |
US8104909B2 (en) * | 2007-12-18 | 2012-01-31 | Lg Innotek Co., Ltd. | Light emitting module connecting apparatus, light unit having the same, and display device |
US20130128128A1 (en) * | 2010-07-30 | 2013-05-23 | Sharp Kabushiki Kaisha | Lighting device, display device and television device |
US8579455B2 (en) * | 2011-12-02 | 2013-11-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Direct type backlight module and liquid crystal display device |
US20130321717A1 (en) * | 2011-03-18 | 2013-12-05 | Sharp Kabushiki Kaisha | Lighting device, display device and television device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101893216B (en) * | 2010-07-14 | 2012-03-28 | 深圳市华星光电技术有限公司 | Lighting tube supporting frame of backlight module |
-
2012
- 2012-06-20 CN CN201210204446.7A patent/CN102748667B/en not_active Expired - Fee Related
- 2012-08-02 US US13/639,484 patent/US8777438B2/en active Active
- 2012-08-02 WO PCT/CN2012/079567 patent/WO2013189116A1/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070047225A1 (en) | 2005-08-30 | 2007-03-01 | Funai Electric Co., Ltd. | Direct type backlight device for liquid crystal module |
JP2007322697A (en) | 2006-05-31 | 2007-12-13 | Sony Corp | Backlight device and liquid crystal display device |
US20080030648A1 (en) | 2006-06-02 | 2008-02-07 | Sony Corporation | Planar light-source apparatus |
CN101641633A (en) | 2007-04-09 | 2010-02-03 | 夏普株式会社 | Lighting device for display device, display device, and TV receiver |
US8104909B2 (en) * | 2007-12-18 | 2012-01-31 | Lg Innotek Co., Ltd. | Light emitting module connecting apparatus, light unit having the same, and display device |
US20110134629A1 (en) * | 2008-07-29 | 2011-06-09 | Yong Suk Kim | Back-light unit |
JP2011086553A (en) | 2009-10-16 | 2011-04-28 | Sumitomo Chemical Co Ltd | Plane light source device, liquid crystal display, and light diffusion plate |
US20130128128A1 (en) * | 2010-07-30 | 2013-05-23 | Sharp Kabushiki Kaisha | Lighting device, display device and television device |
US20130321717A1 (en) * | 2011-03-18 | 2013-12-05 | Sharp Kabushiki Kaisha | Lighting device, display device and television device |
US8579455B2 (en) * | 2011-12-02 | 2013-11-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Direct type backlight module and liquid crystal display device |
Also Published As
Publication number | Publication date |
---|---|
US20130343040A1 (en) | 2013-12-26 |
WO2013189116A1 (en) | 2013-12-27 |
CN102748667A (en) | 2012-10-24 |
CN102748667B (en) | 2014-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2547589B (en) | Quantum dot backlight module and display device | |
JP6634611B2 (en) | Backlight device and liquid crystal display device | |
EP3076232A1 (en) | Display apparatus | |
WO2017002307A1 (en) | Backlight device and liquid-crystal display device | |
US20210096427A1 (en) | Lighting device and display device | |
TWI468802B (en) | Back-light module | |
US9618681B2 (en) | Quantum dot backlight module and display device | |
US20100134722A1 (en) | Backlight module and display device using the same | |
JP2007003805A (en) | Illumination device and display apparatus with same | |
US20170153497A1 (en) | Backlight module | |
KR101260839B1 (en) | Backlight unit and Liquid crystal display module having the same | |
US8777438B2 (en) | Direct type backlight unit and liquid crystal display device using the same | |
JP2009140663A (en) | Plane light source and liquid crystal display device | |
US11181682B2 (en) | Segmented backlight structure | |
US20180217446A1 (en) | Local dimming backlight modules and display devices | |
WO2008156236A1 (en) | Light guide panel having light mix-member for lcd back light unit and lcd back light unit thereby | |
US9063367B2 (en) | Direct-type backlight unit and liquid crystal display using the same | |
JP4017039B2 (en) | LIGHTING DEVICE AND DISPLAY DEVICE HAVING THE SAME | |
JP5489020B2 (en) | Surface light source and liquid crystal display device | |
KR20170080313A (en) | Backlight unit and liquid crystal display device having the same | |
KR20200110572A (en) | Middle frame and display apparatus having the same | |
US20060083027A1 (en) | Double side backlight module | |
KR20130107052A (en) | Backlight unit and illumination system using the same | |
US10877204B2 (en) | Illumination device and display apparatus | |
KR20170030994A (en) | Backlight with Improved Uniformity |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANG, KUANG-YAO;SU, ZAN-JIA;REEL/FRAME:029103/0041 Effective date: 20120822 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |